Letterbox With Letter-Counting Facility
Review: 5 - "A masterpiece of literature" by , written on May 4, 20020
Great

Letterbox With Letter-Counting Facility

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  • Product SKU: LGKT006
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₹ 399 ₹ 499
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Highlights
  • Product Code: LGKT006
  • Technical Support: upto 30mins Video support
  • Handmade
  • Make in India
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Details
  • Unsoldered PCB and all components to be soldered on PCB.
  • Includes all ICs, Connecting wires and Sensors.
  • Documentation: PCB Specifications Component list, and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.
  • One set of the readymade in working condition.
  • Includes all ICs, Connecting wires and Sensors.
  • Documentation: PCB Specifications Component list and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.

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Specification

Description

Here is a simple Smart Letter-Counting Circuit that starts counting when you insert a letter in the letterbox at your home or office. It is designed to save your time from going to the letterbox to check if there are letters inside. The number of letters present in the box is indicated by a seven-segment display.

When a letter is inserted into the Letterbox With Letter-Counting, it passes between transmitter and receiver. This change in resistance provides a triggering pulse to pin 2 of IC1, generating a short-duration square-wave pulse at its output pin 3. This pulse acts as the clock input for the counter and displays driver CD4033 (IC2). Output pins of IC2 are connected to various segments a, b, c, d, e, f, and g pins of the seven-segment display (DIS1) as shown in the circuit.

This Letter-Counting Facility's common pin 3 is connected to the ground through current-limiting resistor R6. Alternatively, you can also provide a resistor each for each segment after removing resistor R6. Seven-segment display DIS1 displays the number of letters present in the box up to nine.


Block Diagram

Physical Attributes

  • Dimensions (cm) L x W x H : 20 x 15 x 5
  • Weight (gm): 200

Product Video

Customer Reviews

Based on 5 reviews
80%
(4)
20%
(1)
0%
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0%
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K
K.laxma Reddy
5.0 out of 5 stars

Well designed kit. No problems for this beginner.

N
Nikhil Kulkarni
Good

Very clear instructions and packaging

S
Shantulan Mishra
Best in the market

Great learning kit - check your connections

B
Biresh
Project is good

A wonderful project for beginners and electronics students

V
Vikram Singh
Both are best

I have purchase Ready to use kit and Do it yourself both are working well will be buy again